Improvement in boom-saddles and chafing-bands for masts



w T. GRI FFENBERG.

Boom-Saddle and Chafing Bands for Masts.

No. 133,439. Patented Nov. 26,1872.

W Wan ambm AMPHOTU-LITHOGHAPH/G C0. NX/OSEORNE S FRUCESS.)

UNI ED STATES PATENT OFFICE.

WILLIAM T. GRIFFENBERG, OF WILMINGTON, DELAWARE.

IMPROVEMENT IN BOOM-SADDLES AND CHAFlNG-BANDS FOR MASTS.

Specification forming part of Letters Patent No. 133,439, dated November26, 1872.

To all whom it may concern:

Be it known that I, WILLIAM 'l. GRIFFEN- BERG, of Wilmington, New Castlecounty, Delaware, have invented an Adjustable Boom- Saddle andChafing-Band for Masts, of which the following is a specification:

The object of my invention is to enable a boom to be supported upon amast at any required height above the deck, and also to prevent thechafing and wearing away of the said mast by thejaws of the boom.

I accomplish this object by the use of a metal band, A, plainly shown inthe perspective views, Figures 1 and 2, which is composed of twosections, B and B, hinged to each other at a, and arranged to be drawntogether at their opposite edges, and thus clamped tightly to the mastat any required height above the deck, the said band having near thebottom a wide flange or saddle, b, for the support of the jaws d of theboom, which in turning bear against the band above the saddle, thuspreventing the chafing of the mast. I prefer to draw the hinged sectionstogether in clamping them to the mast by screw-bolts passing throughlugs e c on the said sections, as shown in Fig.2, but other equivalentfastening devices may be employed. I also prefer that the sections ofthe band should be hinged together by a pin, f, adapted to tubularprojections g on the said sections, so that the latter may be entirelydisconnected'from each other for convenience in attaching the same to ordetach ing them from the mast; but they may, if desired, be permanentlyhinged together, and may only have sufficient movement to permit thevertical adjustment of the band upon the mast. The band may be made ofboiler-plate with a flanged saddle, I), riveted to each section, asshown in Fig. 3, or the sections may be cast in malleable iron in onepiece with the saddle, as illustrated in Fig. 4.

My invention, although available for all vessels in which booms areemployed, is especially applicable to light-draft schooners and sloopson which deck-loads are carried,

and in which, therefore, it is frequently necessary to raise and lowerthe booms.

I claim- The combination of a boom-saddle and a sectional chafing-bandcapable of vertical adjustment on a mast, as and for the purposedescribed.

. In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

WM. T. GRIFFENBERG. Witnesses:

WM. A. STEEL, HARRY SMITH.

